Compa's syringe/medication "Galacroid" sounds similar to a real drug/substance, "Morphine".

The weapon "Bastard Sword" is a popular sword in many RPGs.

Compa's Tetrotoxin weapon is said to be from the poison in fish. This could reference the puffer fish, which are known to be very lethal to those daring enough to eat it as their bodies are filled with toxins.

AMAZOO.Nep. is a pun off of the popular online shopping site, Amazon.com.

Elysdeon comes from Sega's Phantasy Star series, featured as the penultimate sword once used by the series' first hero, Alis Landale, and handed through the generations, even in its online series.

Prinny references are ear marked in many weapons, as the game is made by NIS, the creators of Disgaea.